from vectors import Vector2d, Vector3d, Vector4d
from matrix import Matrix3x3
from triangle import Triangle

class Engine:
	def __init__(self, width, height):
		self._width = width
		self._height = height
		
	@property
	def width(self):
		return self._width
	
	@width.setter
	def width(self, width):
		raise ValueError("Not allowed")
		
class Mesh:
	def __init__(self):
		self.triangles = []
		self.vertices = []
		
	def load_obj_file(self, path):
		lines = []
		
		with open(path, 'r') as reader:
			lines = reader.readlines()
		
		for line in lines:
			if line[0] == 'v':
				tmp = line.split(' ')
				x = float(tmp[1])
				y = float(tmp[2])
				z = float(tmp[3])
				self.vertices.append(Vector3d(x, y, z))
				
			if line[0] == 'f':
				tmp = line.split(' ')
				
				# Subtract one because the obj file isn't zero indexed.				
				row1 = self.vertices[int(tmp[1]) - 1]
				row2 = self.vertices[int(tmp[2]) - 1]
				row3 = self.vertices[int(tmp[3]) - 1]

				self.triangles.append(Triangle(Matrix3x3(row1, row2, row3)))
				
	def __getitem__(self, key):
		return self.triangles[key]
		
	def __len__(self):
		return len(self.triangles)